Răspunsuri

2014-11-11T22:50:22+02:00
2014-11-11T23:43:08+02:00
{[(a:5):4}x10} -10=60
se calculeaxa retrograd, prin operatiiinverse
[(a:5):4]X10=60+10=70
(a:5):4=70:10=7
a:5=7x4=28
a=28x5
a=140